And wehnee



J. A. BERTRAND.

APPLICATION FILED NOV. 19,19l9- RENEWED OCT-24,1921- Fig '1.

WIN/81958 Patented Dec. 27, 1921.

INVENTOR fa/1'42 uZBeTZTQW A TTORNEYS UNITED S E'ATES;

FTEENT FEEE.

JOHN ANDREW BERTRAND, 0 LOS ANGELES, CALIFORNIA, ASSIGNOR TO ASBU'RYREED, OF LOS ANGELES, CALIFORNIA, AND W'EHNER A. KOCH, OF SAN FRAN-CISCO, CALIFORNIA.

REAMER.

Application filed November 19, 1919, Serial No. 339,077.

To aZZ whom it may concern.

Be it known that I, JOHN A. BERTRAND, a citizen of the United States,and a resident of Los Angeles, in the county of Los Angeles and State ofCalifornia, have invented certain new and useful Improvements inReamers, of which the following is a specification.

My invention is an improvement in reamers, and has for its object toprovide a device of the character specified, especially adapted forreaming bearings of any character, wherein a guide is provided capableof expansion and contraction, to fit within the bearing, and having acutter blade also capable of expansion and contraction with respect tothe guide for reaming the hearing.

In the drawings:

Figure 1 is a front view of the improved reamer,

Fig. 2 is a longitudinal section.

In the present embodiment of the invention a mandrel is provided oftapering form, intermediate its ends as indicated at 1, and havingcylindrical ends 2 and 3. This mandrel is longitudinally grooved asindicated at 4; for receiving the blades 5, as many being provided asmay be necessary or desired, and it will be noticed that the bottoms ofthe grooves are tapering on the same angle as that 'of the peripheralsurface of the body of the mandrel. The rear or inner faces of theblades are inclined, so that when said inner or rear edges are inengagement with the bottoms of the grooves, the outer or front edges ofthe blades will be parallel with the axis of the mandrel. Each blade hasits upper end reduced on the outer edge, as indicated at 6, and thesereduced portions are threaded as shown, for engagement by a nut 7 in theform of a ring, encircling the end 2 of the mandrel in an annular groove8. In order to position the nut 7 in place in the annular groove 8 thenut 7 is split vertically and sprung over the end 2 of the mandrel, andslipped down into position in the annular roove 8. 15 is a loose collarencircling the nut 7 and serving to retain the split nut 7 in engagementwith the reduced threaded portions of the blades 5. It will'be obviousthat when the ring is turned in either direction, the blades will bemoved longitudinally of the mandrel, and in so moving Specification ofLetters Patent.

Renewed October 24, 1921. Serial No. 510,099.

they will be moved radially outward or r: dially inward, depending uponthe direction of the turning of the nut.

A. guide 9 in the form of a sleeve encircles the portion 1 of themandrel, and referring to F1g. 1 it will be seen that this sleeve isslotted longitudinally as shown at 10 and 11. The slots are in twoseries, the slots 10 extending from the upper end of the sleeve to nearthe lower, while the slots 11 extend from the lower end of the sleeve tonear the upper. The slots of one series arealternately arranged withrespect to the slots of the other series, and each slot opens at itsinner end into a circular opening as shown. The sleeve is of resilientmaterial, and it will be evident that when it is moved upward toward thelarge end of the tapering portion of the mandrel it will be expanded,while when it is moved downward toward the small end its naturalresiliency will cause it to contract. The blades or bits 5 are arrangedin the slots 10. There may be one or more blades or bits 5 used on thereamer. In Fig. 1 of the drawing I have shown one blade or bit 5 in oneof the slots 10. In the other slot 10 is a key 14:, the upper face ofwhich should not project beyond the periphcry of the sleeve 9. Thesleeve is moved by means of a nut 12 at the lower end of the mandrel,the nut encircles the mandrel and has threaded engagement with theportion 3 thereof below the sleeve, a collar 13 being arranged betweenthe said lower end of the sleeve and the nut, and the nut has radialopenings for receiving a tool for turning the nut.

In operation, the reamer, contracted, is inserted in the bearing to bereamed, and the guide is expanded until it gently touches the wall ofthe bearing, the sleeve being adjusted by means of the nut 12. lVhen theguide or sleeve is properly expanded, the cutter or cutters are adjustedby means of the nut 7 The reamer is now turned, in any suitable mannerto remove a thin shaving from the bearing wall, and the process isrepeated as often as necessary. While the reamer clescribed is forgeneral application it is intended principally for reaming out wornjournals or bearings which are no longer true cylinders. The' reamer isespecially adapted for truing automobile bearings, such and willbearing.

I claim:

1. A reamer having a tapering body and cylindrical ends and havinglongitudinally extending guides for cutters, the bottoms of the groovesbeing inclined outwardly toward one end, bits movable in the grooves andhaving reduced threaded ends, a nut journaled on one of the cylindricalportions and engaging the threaded ends of the hits, a sleeve encirclingthe bits and splitv ion tudinally to provide resiliency, and means formoving the sleeve longitudinally of the mandrel.

2. A device of: the character specied, comunted to 1 prising a taperingmanor-cl, bits me move longitudinally of the mandrel, means for movingthe bits, a guide sleeve fitting closely about the mandrel and resilientand having slots through which the bits may extend, and means for me bigsaid guide longitudinally of the mandrel to expand and contract thesame, said moving means comprising a nut'threaded on to the small end ofthe mandrel and engaging the end of the sleeve.

3. A device of the character specified, comprising a tapering mandrel,bits mounted to move longitudinally of the man drel, means for movingthe hits, a guide sleeve fitting closely about the mandrel and resilientand having slots through which the bits may extend, and means for movingsaid guide longitudinally of the mandrel to expand and contract thesame, the moviin means for the bits comprising a threaded collar, thebits having threaded extremities engaged by the collar.

'-l. A device of the character specified, comprising a tapering mandrel,bits mounted to move longitudinally of the mandrel, means for moving thehits, a guide sleeve fitting closely about the mandrel and resilient andhaving slots through which the bits may extend, and means for movingsaid guide sleeve longitudinally of the mandrel to expand and contractthe same.

5. A device of the character specified, comprising a tapering mandrel, aresilient guide sleeve mounted to move longitudinally of the mandrel toexpand and contract the sleeve, and bits movable longitudinally of themandrel to expand and contract said bits, the sleeve having slotsthrough which the bits extend.

G. A device of the character specified, comprising a mandrel, anexpansible sleeve mounted on the mandrel and adapted to be expanded 'orcontracted, a bit projecting through said sleeve, and means foradvancing said bit radially from the'axis of the mandrel.

7. A device of the character specified, comprising a mandrel, anexpansible sleeve mounted on the mandrel and adapted to be expanded orcontracted, means f'ior expand ing or contracting said sleeve, bit pojecting through said sleeve, and means i r advancing said bit radially"from the axis of said mandrel.

8. A device of the character specified, comprising a mandrel, anexpansible sleeve mounted on the mandrel to is expanded or contractedand having slots parallel to the axis oi said mandrel, a bit positionedin one 0t said slots and projecting from r .l( sleeve, and means foradvancing said bit radially from the axis of said mandrel.

.9. A device of the character specified, comprising a mandrel, a sleevemounted on said mandrel, means for expanding or contract ing saidsleeve, said mandrel and said sleeve each having a longitudinal slot inalinement with each other, a bit positioned in said slot and projectingfrom said sleeve, and means for advancing said bit 'adially from saidsleeve.

10. A device of the character specified, comprising a mandrel, anexpansible sleeve mounted thereon, said sleeve having longi tudinalslots extending from one end of the sleeve to a point spaced from theother end of the sleeve, said slots being alternately arranged extendingfrom opposite ends of said sleeve, means for expanding or contractingsaid sleeve, and a bit mounted in said mandrel and projecting throughone of said slots.

11. A device of the character specified,

comprising a mandrel, an expansible sleeve mounted thereon and adaptedto be expanded or contracted, and a bit projecting through said sleeve.

12. A device of the character specified, comprising a mandrel, anexpansible sleeve mounted for longitudinal movement on said mandrel,means for expanding or contracting said sleeve, a bit projecting throughsaid sleeve, and means for advancing said bit radially from the axis ofthe mandrel.

JOHN ANDREN BERTRAND.

